SAFETY - PRECAUTIONS AND FEATURES
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SAFETY FEATURES
Cincinnati Sub-Zero incorporates many safety features in the design of its
equipment. These safety features provide protection for the equipment, as well as
for operating and maintenance personnel.
ELECTRICAL CIRCUIT PROTECTION
1. The MCB-1.2 model (115VAC,60 Hz) requires a dedicated 20 amps circuit. The
MCB 1.2 model (230VAC,50 Hz) requires a dedicated 16 amps circuit. The
building/facility circuit breaker will provide short circuit protection between mains
conductor and protective earth. See the electrical schematic for information on
the other models.
2. Compressors have internal thermal overload protection which will shut down the
compressor in the event of a thermal overload.
REFRIGERATION SYSTEM PROTECTION
1. The refrigeration systems utilize refrigerants which are non-! ammable and non-
explosive.
OVER-TEMPERATURE PROTECTION
High temperature limit controllers, thermal cut-outs, and thermostats are installed to
protect the chamber from exceeding design limits. The safety devices remove power
only from the chamber heaters when an over-temperature condition exists in the
chamber. They DO NOT remove power from the product being tested.
1. High temperature limit controller (9-Inst) (MCB(H) Models) (MC(H)-3 models)
Chamber over-temperature protection only. It is preset to open at the
temperature indicated on the electrical schematic (typically 200ºC-240°C). Once
the temperature in the chamber drops below the Hi limit setting, cycle power to
the chamber to reset the limit controller.
2. Product High/Low Limit (Optional)
The chamber may be equipped with a Product High/Low Limit Alarm
that incorporates an independent type “T” thermocouple to monitor part
temperature. The high/low limit alarm shuts down the chamber and sounds an
audible alarm if the preset temperature limits are exceeded. The alarm can be
used by the customer to shut down the product under test (SEE ELECTRICAL
SCHEMATIC for proper connection). The limit alarm is both high and low, can
be set for latching or non-latching, and has an adjustable hysteresis band.
DO NOT CONNECT
THIS UNIT TO A GFI
CIRCUIT BREAKER.
WARNING
!
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